Ball-governor



(No Model.)

R. MGKENNA.

BALL GOVERNOR.

Patented Jan. 13, 1885.

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lhvrrnn @raras Parietti @rerea- ROBERT lVCKENNA, 0F VHITE, TENNESSEE.

BLLGOVERNOR.

s'PncrPIcATI'oN forming part of Letters Patent No. 310,838, dated January 1a, 1885. Application tiled June 17, 1884. (No model.)

To all wiz/0771, it may concern/.-

Be it known that I, ROBERT MoKnNNn, a citizen of the United States, residing at Vhite, in the county of Shelby and State of Tennessee, have invented a new and useful Improvement in BallGovernors, of which the following is a specification.

My invention relates to an improvement in ball-governors, the object being to produce a governor which shall be simple and cheap of construction, efficient of service, and not liable to get out of order.

The invention consists in the construction and arrangement of parts, substantially as hereinafter set forth. I attain these objects by the mechanism illustrated in the accompanying drawing, in which the figure is a verti cal sectional elevation of my improved ballgovernor.

Similarletters refer to similar parts throughout the drawing.

A represents the stand, B the drivingshaft, b b the ruiter-gear, G the main shaft, D the arms pivot-block, E E the arms, E F t-he balls, and G the valve-stem, of my improved ballgovernor, all ot' which are constructed, arranged, and, excepting valve-stem G, operated in a manner similar to that in which like parts are constructed, arranged, and operated in an ordinary ball-governor.

A novel and important principle of construction will now be explained in connection with the device as described. The upper part of main shaft C is a hollowsquare, NV, in crosssection, the hollow being open throughout on the two sides. Valve-stem G is provided on a part of its length with a right-hand thread, h, and is also provided on another part of its length with a left-hand thread, g. These threads h and gare on the part of valvelstem G that is in hollow square NV. A pair of jaws, 0 o, `having a right-hand thread on their face, and a pair of jaws, p p, having a left-hand thread on their face, are pivoted in hollow square V. Two of these jaws-one of pair o o and one of pair p p-are joined together at their pivotal ends and pivoted midway of their united length vertically in line with valvestem G. Their free ends flare backward, causing their backs to form an angle at their pivot N. The other ltwo jaws-one of pair o o and one of pair p p-are pivoted and arranged in the same manner on the opposite side of valvestem G. Two anti friction-rollers, K K, adapted to the backs of jaws o o and p p, are journaled in and carried up and down by a roller-frame, M,which latter is made to fit and stem G from turning by coming in contact with stand A. Then the engine is in motion at the desired rate of speed, the balls FF will swing at an elevation that will bring antifriction rollers K K into the angle formed by the backs ofjaws o o and p p. A further outthrow of balls E F will, by raising arms E E, rods J J, and roller-frame M, roll anti-friction rollers K K upon the backs of jaws p j), closing jaws 'p p on valve-sten1 G, causing the left-hand thread on the face oi' jaws p p to mesh into the left-hand thread g on valvestem G. Vhile the threads are thus. in mesh, jaws p p, by rotating round valve-stem G, which is prevented from turning by a pin, S, previously referred to, will press valve-stem G down, so as to adjust the governor-valve and regulate the speed of the engine. An infall of balls E F would roll anti-friction rollers K K down on the backs of jaws o o, closing them on valve-stem G, causing the righthand thread on the face of jaws o o to mesh into the right-hand thread h on valve-stem G. Vhile the threads are thus in mesh, jaws 0 o, by rotating round valve-stem G, will raise valve-stem G up, so as to adjust the governor'- valve and regulate the speed of the engine.

rms pivot-block D is vertically adjustable on main shaft C, and can be retained after adjustment by a set-screw, R. Any desired rate of speedwithin the capacity of the steam and the engine can be attained by the adjustment of arms pivot-bloek D on main shaft C.

I claim as myinvention, and desire to secure l ter having a righlhand thread, h, 0n a part by Letters Patentl of its length and a left-hand thread, g, 0n an- 1o In a ball-governor, the combination of jaws other part of its' length. o o and p p, their pivots N, anti-friction roll- 5 ers K, roller-frame M, connecting-rods J, and ROBERT MCKENNA pins T and V with stand A, driving-shaft B, Witnesses: unter-gears b, main shaft C, arms pivot-block E. D. ELLIS,

D, arms E, balls F, and Valve-stem G, thelat- G. C. RODGERS. V 

